74ACQ374SC

Overview

The onsemi 74ACQ374SC is an octal D-type flip-flop featuring buffered positive edge-triggered clocks and three-state outputs. It operates within a supply voltage range of 2V to 6V, supporting low-voltage applications. The device delivers a maximum propagation delay of 8.5ns at 5V with 50pF load and supports clock frequencies up to 90MHz. Output drive capability is rated at 24mA for both high and low states, with a static current consumption of 40µA. It utilizes a 20-pin PDIP package (0.300 inch width) and functions reliably across an operating temperature range of -40°C to 85°C.

Feature Summary

• Buffered positive edge-triggered clock input ensures precise timing control for data latching.
• Three-state outputs facilitate direct connection to bus-oriented systems without external drivers.
• Wide supply voltage operation from 2V to 6V accommodates various logic family interfaces.

Applications

• Bus-oriented memory register storage
• I/O port buffering in embedded systems
• Parallel data acquisition circuits

Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm package integrity and pin alignment against the 20-PDIP specification. Review manufacturer documentation for any specific handling or storage requirements related to CMOS technology. Ensure replacement strategies account for potential lead time variations in legacy components.

Selection Notes

Select this component when wide voltage operation between 2V and 6V is required alongside standard 74AC functionality. The buffered clock input distinguishes it from transparent latch variants. Consider the through-hole PDIP package constraint if surface-mount alternatives are not feasible. Evaluate the 90MHz speed limit against system timing requirements before finalizing the design.

Part Context

This part belongs to the 74ACQ series, which extends the standard AC logic family with qualified automotive-grade reliability features. It shares functional compatibility with the 74AC374 but offers enhanced robustness. The SC suffix denotes the specific 20-pin plastic dual in-line package configuration used for prototyping and through-hole PCB designs.

Replacement Considerations

Public confirmed substitute part numbers include CD74AC374E and SN74AC374N from Texas Instruments. These alternatives provide equivalent logical functionality and pinout compatibility for direct board-level substitution.